树莓派qt录音程序

实时显示采集的波形，振幅，二维码，wifi，电量，内存等功能。
window版下载地址：

安装qt:
1.命令行输入：sudo apt-get install samba//安装samba

2.命令行输入：sudo apt-get install qt5-default //安装qt5

3.命令行输入：sudo apt-get install qtcreator //安装qtcreator

qmake
make 编译

#include "qaudiowave.h"
#include "qpainter.h"
#include <QDebug>
#define SCALE_HEIGHY 20
#define MIN(x,y) (x)<(y)?(x):(y)
#define MAX(x,y) (x)>(y)?(x):(y)

QAudioWave::QAudioWave(QWidget *parent) : QWidget(parent)
{
    qRegisterMetaType<QVector<QPointF> >("QVector<QPointF> ");//注册数据类型
    foreground = QColor(255, 184, 255);
    background = QColor(40, 40, 40);
    girdLineGround = QColor(255, 255, 255);
    everyLineColor = QColor(139,105 ,20);
    scaleLineColor = QColor(0, 0, 0);
    girdLineWidth = 0.5;

    recordPassageway = PASSAGEWAY_1;
    everyLineColor = QColor(139,105 ,20);

    QPalette palette(this->palette());
    palette.setColor(QPalette::Background,"#ffffff");
    this->setPalette(palette);


    QList<QAudioDeviceInfo> devicelist = QAudioDeviceInfo::availableDevices(QAudio::Mode::AudioInput);
    for(int i = 0; i < devicelist.size(); i++){
        qDebug()<<"++++++++++++++++++++"<<devicelist.at(i).deviceName();
    }

    QAudioFormat formatAudio;
    formatAudio.setSampleRate(8000);
    formatAudio.setChannelCount(1);
    formatAudio.setSampleSize(8);
    formatAudio.setCodec("audio/pcm");
    formatAudio.setByteOrder(QAudioFormat::LittleEndian);
    formatAudio.setSampleType(QAudioFormat::UnSignedInt);
    //打印可用设备
    QList<QAudioDeviceInfo> list = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
    qDebug()<<list.at(0).deviceName();

    QAudioDeviceInfo inputDevices = QAudioDeviceInfo::defaultInputDevice();
    m_audioInput = new QAudioInput(inputDevices,formatAudio, this);

    m_device = new XYSeriesIODevice(this);
    m_device->open(QIODevice::WriteOnly);
    connect(m_device,SIGNAL(sendPaintPoints(QVector<QPointF> )),this,SLOT(acceptPaintPoints(QVector<QPointF>)));
    connect(m_device,SIGNAL(sendAmplitudeData(QByteArray )),this,SIGNAL(sendAmplitudeData(QByteArray )));

    m_audioInput->start(m_device);
}

QAudioWave::~QAudioWave()
{
}

void QAudioWave::paintEvent(QPaintEvent *)
{
    //绘制准备工作,启用反锯齿
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing);
    //绘制背景
    drawBg(&painter);
    //绘制数据
    drawData(&painter);
}

void QAudioWave::drawBg(QPainter *painter)
{
    painter->fillRect(this->rect(), background);
}

void QAudioWave::drawData(QPainter *painter)
{
    QPen pen;
    pen.setColor(QColor(0x4B,0xF3,0xA7));   //波形图画笔
    painter->setPen(pen);      //设置画笔
    painter->drawLines(paintPoints);
}

void QAudioWave::resizeEvent(QResizeEvent *event)
{
    Q_UNUSED(event);
    m_device->acceptResizeWidth(this->width());
    m_device->acceptResizeHeight(this->height());
}

void QAudioWave::thisUpdate()
{
    this->update();
}

void QAudioWave::acceptPaintPoints(QVector<QPointF> points)
{
    paintPoints.clear();
    paintPoints = points ;
    this->thisUpdate ();
}

void QAudioWave::setDisplayWaveTime(int value)
{
    m_device->setDisplayWaveTime(value);
}